Bur-stand.



R. B. SAVIN.

BUR STAND.

APPLICATION man SEPT- 5. 1914.

Patented Apr. 113, 1915.

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R. B. SAVIN.

BUR STAND.

APPLICATION men SEPT. 5. 1914.

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oration RALPH B. SAVIN, 0F PHILADELPHIA, lPENNsTLvflNlfl, ASSTGNOR TO THE S. S. WHITE DENTAL MANUFACTURING COMPANY, A CORPORATION 013' PENNSYLVANIA.

BUR-STAND.

Application filed September 5, 1914. Serial No. 860,348.

To all whom it may concern:

Be it known that I, RALPH B. SAVIN, a citizen of the United States, and a resident of the city of Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Bur-Stands, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates particularly to that class of devices in which a plurality of tools, such as drills or burs, may be displayed, and is directed especially to a rotatable container for successively presenting such tools in position for convenient selection by the operator.

The principal object of my invention is to provide a bur container with a closure having means for rotatably supporting the bur containing block or body, when not-em-- ployed as a closure, and having means to prevent the accidental displacement of the burs from their respective sockets in said block when employed as a closure for the burs in said block.

Other objects of my invention are, to provide a bur container with means for centering the closure with respect to the bur containing block; to provide a pivotal bearing within the holder body; and to dispose said bearing in a position approximating the center of gravity of the bur containing body.

My invention also includes all of the various novel features of construction and arf'iangement hereinafter more definitely speci- In the accompanying drawings, Figure 1 is a central vertical sectional view of a bur stand constructed in accordance with my invention, showing the closure in position to protect the burs; Fig. 2 is a central vertical sectional view of said bur stand showing the closure inverted and in position to rotatably support the bur containing block; Fig. 3 is a fragmentary plan view of the bur stand as shown in Fig. 2; Fig. 4 is a central vertical sectional view similar to Fig. 1, embodying a modification of-my invention; and Fig. is a central vertical sectional view similar to Fig. 2, showing the form of bur stand illustrated in Fig. 4.

Tn said figures, the bur containing block or body 1 is provided with the depending boss 2 afiording a base upon which the structure may normally rest, and said block 1 has the circumferential rim or head 3 upon WlllCh the lower edge of the closure 4: may be supported. The upper portion of the block 1 1s stepped by providing the boss 5 to form plane surfaces 6 and 7 at varying levels 1 n tvhich the bur sockets may be drllled 1n concentric rows,'the bur sockets 9 and 10 being drilled in the surface 6 and the bur sockets 11 being drilled in the raised surface 7. The sockets 9- are of considerably less depth than the sockets 10 and are arranged to receive the short burs-12, while the sockets 10 are arranged to receive the long burs 13, and the sockets 11 in the up per surface 7 receive the long burs 14C.

The closure 4, as best shown in Fig. 1, is stepped in conformity with the planes of the bur points ofthe respective concentric rows of burs, and provides walls 15, 16 and 17 respectively overlying, in closely adjacent relation, the points of the respective burs 12, 13 and 14, so that should the bur stand be accidentally overturned the burs will be retained in their respective sockets in the bur containing block or body 1 by the closure, when in position to cover the burs. The closure 4 is provided with an in wardly extending stem 18 having a conical free end which is arranged to enter the sleeve 19 extending centrally through the block 1, and having its upper edge 20 suitably beveledso as to guide the stem into the bore 21 of said sleeve 19 when the closure is placed over the burs in said bur containing block 1. Thus it will be seen that said closure is readily guided, by the stem entering the sleeve, to its central position, and its edge is thereby seated upon the rim or bead 3.

The stem 16 is provided with a shoulder 22, which, as shown in Fig. 2, provides a suitable bearing for the lower edge of the sleeve 19, and upon which the bur containing block may be rotatably supported, so that the closure, when in the inverted position shown in Fig. 2, affords a convenient stand upon which the bur containing block may be rotated to successively present the burs in the concentric rows convenient for the selection of the operator.

It may be here noted that when the bur block 1 is rotatably mounted upon the stem 16 and rests upon the shoulder 22, the free edge of the closure is maintained in spaced relation from the bead or rim 3 so as to afford freedom of rotation of the bur block 1 upon said stem 16.

The top of the closure 4 is provided with a circumferential bead 25, which affords desirable stability against rocking when the closure is inverted and is employed as a base upon which the bur block rotates.

In the form .of my invention shown in Figs. 4 and 5, the bur block 26 is provided with a central core 27 which terminates at its upper end in a knob 28, whereby it may be conveniently lifted by the operator. Said core 27 is provided with bores 29 and 30 extending from the top and bottom thereof and respectively terminating at 31 and 32 and arranged to receive the stem 33 on the closure-34. The stem 33 has the conical free end 35 Which is cooperative with the beveled surface 36 in the knob 28 to guide the closure into central position when placed to cover the burs, and which afi'ords a conical bearing cooperative with the surface 32 to rotatably support the bur block 26 when disposed in the position shown in Fig. 5.

It may be here noted that in this form of my invention the bearing support is disposed in a position approximating the center of gravity of the bur block 26, so that said bur block may be suspended and free to rotate upon the conical free end of said stem 33.

I do not desire to limit my invention to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications maybe made therein without departing from the essential features of my invention as defined in the appended claims.

Having thus described my invention, I claim:

1. A bur container comprising a 'body having sockets to hold the burs, and a closure for covering said burs, having means forming a rotatable support for said body when inverted and placed beneath said body.

2. A bur container comprising a body having means for supporting the burs in spaced relation, a closure normally covering said burs and having means for centering it .with respect to the body, said centering ranged tocarry a.p1urality of burs in up-' right position and having a central aperture therein, and a closure for covering said burs and having a central stem projecting into the aperture in said body, and forming a rotatable support therefor.

5. A bur container comprising a body arranged to carry a plurality of burs and having a central aperture therein, and a closure for normally covering said burs and having a central stem, arranged to enter said aperture from the top to center said closure with respect to said body, and arranged to enter from the bottom of said body when inverted, to rotatably support the body.

6. A bur container comprising a body carrying a plurality of burs relatively spaced and having a circumferential rim and a central aperture, and a cupped member for covering said burs having its edge resting upon said rim when serving as a closure, said closure having an inwardly extending stem for rotatably supporting said body when said closure is inverted and placed beneath said body. v

In Witness whereof, I have hereunto set mv hand this 4th day of September, A. D., 1914.

RALPH B. SAVIN. 

